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Mathematics, 22.11.2019 01:31 stormserena

Suppose a network has 40 computers of which 5 fail. (a) how many possibilities are there for the five that fail? (b) suppose that 3 of the computers in the network have a copy of a particular file. how many sets of failures wipe out all the copies of the file? that is, how many 5-subsets contain the three computers that have the file?

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